Gear-cutter



(No Model.) 2 Sheets-Sheet 1.

C. W. CRARY.

GEAR CUTTER.

No. 282,059. Patented July 31, 1883.

(No Model.) 2 Sheets-Sheet 2. O. W. GRARY.

GEAR GUTTER.

NOAl 282,059. Patented July 31 1883l 2 a/ D n EL HINIJ Wynn.

ETERS. Pnnw-Lnmgrapm, washington. D. C.

UNITED STATES PATENT OFFICE.

CUSHMAN V. GRAB-Y, OF CHICAGO, ILLINOIS.

GEAR-CUTTER.

SPECIFICATION forming To aZZ whom t may concern:

Be it known that I, CUsHivmN W. ERARY, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Gear-Cutters, of which the following, in connection with the accompanying drawings, is a specification.

In the drawings, Figure l, Sheet l, is a side elevation of a gear-cutter embodying my improvements.` Fig. 2, Sheet l, is a top or plan view thereof. Fig. 3, Sheet 2, is a vertical cross-section in the plane of the line rv x of Fig. l, the wheel-blank and the parts imlnediately connected thereto being removed. Fig. 4, Sheet 2, is a detail, showing the spiral miter-wheels for adjusting the spindle vertically, viewed from below. Fig. 5, Sheet 2, is a detail, the same being a side view of the top center and top center bracket. Figf, Sheet 2, is a detail in perspective of a part of the carrier, and Fig-7 is a detail of a part ofthe frame.-

Like letters of reference indicate like parts.

My principal obj ect is to provide means whereby the gear may be cut between two centers and on the same mandrel on which they were turned. I also aim to provide means for adjusting the spindle vertically with facility.

In the drawings I have represented a gearcutter adapted to cut various kinds of gear, and therefore having many adjustable parts, all of which it will be unnecessary forme here to explain with particularity, as they are not all necessarily relatedto my improvements, as will hereinafter more fully appear.

A is the frame of the machine, on the front part of which is avertical standard or upright, A, and at the rear end of which is an upright, All r B is a vertically-adjustable bar or support applied. to 'the uprights A and A, and arranged horizontally, as shown. The bar B is slotted, as shown at c, Fig. 2.

C is a top center, which is applied adjustably to the bar B, being clamped thereto by means of bolts and nuts, the bolts passing through the slot a, thereby permitting the top center to be set a greater or less distance from the upright A. It may seldom be necessary, in practice, to use the long bar B, and therefore I have shown a top center bracket, B', in Fig. 5 applied only to the upright A', and vertically adjustable with relation thereto, and

part of Letters Patent No. 282,059, dated July 31, 1883. Application filed April 4, ISB. (No model.)

the top center maybe adjusted or moved back and forth on the bracket. The bracket B performs the same functions as the bar B-that is, both support the top center, so that it can be adjusted vertically and horizontally. rEhe bracket B is, in other words, the equivalent of the bar B, but shorter, and supported only at one end.

D is the spindle, and D is a horizontal bar attached to its lower end and moving therewith. E E are screws depending freely from a part ot' the lframe A and passing through female screws in the bar D.

F F are spiral initer-gears rigid] y attached to the screws E E.

G is a horizontal shaft. on the outer end ol which is a hand-wheel, G.

H H are spiral miter-gears rigidly attached to the shaft G and engaging the gears F F. By turning the wheel G the spindle D will be either raised or lowered, as may be desired.

H is ataper mandrel or socket dropped into the upper end of the spindle D, and b is a removable pin eXtendi ng laterally from the lower part of the mandrel H into a slot, b, in the spindle, so that the said spindle and mandrel will be rotated together with certainty, and be prevented from being removed until the said pin is withdrawn. I is a carrier applied to the upper end of the mandrel H, and J is a center or lower registering piece dropped into the upper end of Lthe mandrel H. -It is t0 be understood thatthe carrier I turns with the spindle D. The spin,- dle D may be turned by means of any wellknown or suitable means for the purpose of carrying the wheel or wheel-blank around, so that it Iwill be presented to the cutter in such a manner that the cogs will be cut in succession. K represents mechanism which I employ for that purpose; but as I do not here make special claim thereto, I will only state that this mechanism is mounted on a vertically-movable support, L, traveling vertically with the spindle D, and actuated by means of a handcrank, M, which, in turn, rotates gearing N, whereby a worm or spiral, O, is made to turn a, gear, O', rigidly attached to the spindle D. l? is the wheel or wheel-blank, and P is the mandrel on which it was turned up, ready for the gear-cutter.

also having in it a longitudinal slot, so that y IOO Q is a dog or earrier clamped to the lower part of the mandrel P. The Carrier Q, has a depending arm, c, entering` the Carrier l and clamped thereto, as shown in Fig. 1. Theupper and lower ends of the mandrel 1) have Haring or tapering` indentures or sockets toreceive the upper and lower centering-points.

R is the cutter, and R is an adjustable head which Carries or supports the sha'itd, on which it is mounted. This head is adjustable variously, so that the Gutter maybe set to do va ri ous kinds ofwork, and so that it may be earried to and from the Wheel or blank te be eut.

To prepare this machine 'for Work, l remove the mandrel P, with the Wheel or blank l? and the carrier Q thereon, from the lathe in which theu'heel or blank was turned er prepared for cutting, arrange the said mandrel between the centering-points oi" the gear-cutter, elamp the dog Q to the carrier I and the latter to the spindle D, and set the cutter R. The cutter, as the work proceeds, is fed or moved forward in the manner usual in machines 0i' this Class, or in any well-known or suitable way.

It will be pereeived from the 'foregoing' de seription that the Wheel or blank is Centered l between two Centers, and is eut on the same mandrel on which it was turned, and Without being` removed therefrom. It will also be peree'ived that the eentering-points may be adjusted with facility.

Having thus described my invention, what I elaim as new, and desire to seenre by Letters Patent, is-

l. The combination, in a gear-cutter, oi' an adjustable top Center, an adjustable lower eenter, a lmandrel for holding the wheel or Wheelblank, a rotary spindle, and Carriers for eonnecting the said mandrel and spindle, subL stantially as specified, for the purpose of thereby admitting` of the Wheel being ent between the said Centers and on the mandrel on which. it was turned.

2. The combination, in a geai.eutter, of the spindle D, bar D, sere/Ws E E, the spiral mitergears F F, shaft G, and the spiral mitergear H H, substantially as and for the purposes speeiied.

CUSl'flMAN XV. CRARY.

lllitnesses:

l?. F. VARNER, .l`. l. llAnPnNNY. 

